Dear UPS store employee - You're surrounded by people all day long - WHY WOULD YOU NOT WEAR A MASK?!
Moreover, WHY WOULD YOU ARGUE WITH A CUSTOMER WHO IS ASKING YOU TO WEAR A MASK?!
Finally, WHY WOULD YOU ESCALATE THIS INTO AN ACTUAL FIGHT WITH THAT CUSTOMER?!?
I was already in my feelings about having to ship all my Christmas gifts to friends and family this year, I really wasn't prepared to handle your bizarre shit. I was scared for me, for your coworker, and for everyone in the store, especially after that customer left and YOU STILL REFUSED TO WEAR YOUR DAMN MASK.
I totally get it: working outside the home sucks. Working in customer service sucks. Wearing a mask sucks. But three sucks do not make you right. Just fucking wear it.